Furnace plant



(No Model.)

.13.001151 111111111105 PLANT.

No. 510,589. Patented Dec. 12, 1893.

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' UNITED STATES PATENT OFFICE.

vEOKLEY B. COXE, OF DRIFTON, PENNSYLVANIA.

FU RNACE- PLANT.

SPECIFICATION vforming part of Letters Patent No. 510,589, datedDecember 12, 1893.

Application filed November 2,1898. Serial No.489i'738- (N0 mdeL) To allwhom it may concern.-

Beit known that I, ECKLEY B. COXE, a citizen of the United States,residing at Drifton, in the county of Luzerne and State of Pennsylvania,have invented certain new and useful Improvements in Furnace Plants, ofwhich the following is a specification.

This invention relates to that class of fur- The furnace to which mypresent improvements are herein shown applied is the furnace describedand claimed in Letters Patent of the United States No. 499,716, grantedto me June 20, 1893.

-In the drawings accompanying and forming a part of this specification,Figure 1 isa front elevation (as seen from the right-hand in Fig. 3), ofa furnace-plant embodying my present invention.

ing shown in section for more fully illustrating the nature of theinvention. Fig. 3 is a sectional side elevation of the furnace,andcorresponds substantially with Fig. 1 of the drawings of my aforesaidLetters Patent; a further illustration of the preferred construction ofthe furnace is also shown in Fig. 2 of said patent.

Similar characters designate like parts in all the figures.

My improved furnace-plant consists of a traveling-grate furnace, meansfor supplying fuel to the furnace, a blowing-machine connected with thefurnace for supplying air thereto, driving-apparatus for actuating thetraveling grate and a mechanism-actuator connecting the grate-drivingapparatus and the blowing-machine for corresponding working movements,whereby the traveling grate and the blowing-machine will haveproportionate velocities, and a change in the velocity Fig. 2 is aplanview of a' portion of the furnace-plant, the furnace beof one ofthese be accompanied by a proportionate change in the velocity of theother.

The furnace is shown in Figs. 1 and 3 set underneath a steam-boiler, B,which may be replaced by any other thing to be heated; or, the furnacemay have an ordinary tire-brick roof, and the heated gases be conductedaway in a flue, to be used at some distant point. In the presentinstance, the furnace is designated in a general way by F,the'blowing-machine by L, the furnace-grate-driving apparatus by D, andthe motor, or mechanismactuator, by M.

- The furnace in the preferred form thereof herein shown, comprises theusual side-walls, front-Wall and rear-wall, as more fully set forth inthe aforesaid Letters Patent, and is provided with a traveling grate,designated in a general way by G, said grate being carried bychain-wheels, 12 and 14, that are supported on shafts, 13 and 15,respectively, journaled in bearings on the walls of the furnace. Thetraveling grate is or may be 'supported along the lower run thereof byguide-ways, as 19; the upper run thereof being, in the present instance,supportedby the' upper side of the air-chamber J. This chamber is showndivided into' the separate air-blast chambers, a, b, c, d, to which airis supplied from the blowing-machine L from the main conduit N throughthe separate conduits a, b, c', d. These distributing-conduits are shownprovided with air-valves, or regulating-valves, a, b, c, d, whereby toindependently regulate the pressure ofthe air-blast in the said chambersd, b, c, d, respectively, as described and claimed in my aforesaid priorLetters Patent.

The driving apparatus for actuating the traveling grate comprises thedescribed shafts and chain-Wheels, and some suitable means for applyingpower thereto, as, for instance, the worm-wheel 40, fixed on the outerend of the shaft 15, and the driving-shaft 42 carried in bearings on theframework and having a Worm, 41, meshing With said worm-Wheel, thisshaft being provided with a pulley, '44, or other device whereby powermay be applied thereto.

The blowing-machine L preferably consists,

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as indicated. in the drawings, of an ordinary fan blower, which may beof the class known in the market as a pressure blower, or, in somecases, a piston blower maybe substituted for the fan blower.

The mechanism-actuator M may consist, as indicated in the drawings, of asteam-engine, the one herein represented being shown of the so-calledWestinghouse type, and comprising a framework,20, two cylinders, 2l and22, and a valve-chest, 23, to which steam is supplied from the boiler B,through the pipe 24, in which is shown a valve, 25, for admitting steamto the motor M and for regulating the speed thereof. The shaft 26 of themotor M extends to the blowing machine L for driving the same, and isshown provided, on the opposite end thereof, with the driving-pulley,27, which is shown directly connected by a belt, 28, with the aforesaiddriving-wheel 44 on the shaft 42 of the grate-driving apparatus D. Bythis means or other well-known means similar thereto, theblowing-machine is directly and positively connected with the drivingapparatus of the endless grate, so that proportionate working movementswill be imparted thereto; and said connection is such that if the speedof one be varied, the speed of the other will be proportionately varied.This variation may be effected, in the form of the furnace-plant hereinshown, by opening or closing the ordinary stop-valve in the steam-pipe24, so as to vary the speed of the mechanism-motor M.

By varying the speed of the motor, or mechanism-actuator M, the workingmovement of the blowing-machine L will be changed; and also the workingmovement of the traveling grate will be correspondingly changed, and thepressure of the air-blast in each of the series of chambers, a, b, c, d,will be changed in varying ratios, depending upon the relative pressurestherein. Usually,in operating this class of furnaces, the highestpressure will be used in the chamber b, a somewhat lower pressure in thechamber c, and a much lower pressure in the chamber d, while thepressure in the chamber c, under that portion of the grate where thefuel is ignited, will usually be between the pressures in the chambers hand c. By reason of the organization described, the air-pressures in thesuccessive chambers will be changed in different ratios, the lowerpressures being varied by a dierent amount, proportionately, on thereduction or increase of the speed of the blowing-machine and travelinggrate. This peculiar effect, or result, is one of the objects of myinvention, since a different grate-speed and consequent difference inthe rate of combustion of the fuel, properly requires such a variationas here set forth in the ratios of the airblasts.

The fuel is or may be supplied to the traveling grat-e from asupply-hopper, H, set at the forward end of the furnace and deliveringthe fuel through an inclined passage-way,

5, onto the upper run of the traveling grate at the extreme forward endof the furnacechamber C, as indicated in Fig. 3 and more fully describedin the said prior Patent No. 499,716, to which reference may be had forfurther description of such minor features of the furnace as areconvenient to the operation of the same.

The steam-engine or other actuator M being set running, power istransmitted therefrom to and through the driving-apparatus D, to thegrate-mechanism of the furnace, to move the upper run of the gratetoward the left-hand in Fig. 3. During this time the fuel from thehopper H runs downward onto the grate, forming a layer, 6, which beingburned as it passes through the furnacechamber C, the cinder is finallydelivered from the rearward end of the traveling grate (at the left-handin Figs. 2 and 3), as more fully described in the aforesaid LettersPatent. At the same time the motor M actuates the blowing-machine L, tosupply air, through the conduits and air-chambers, to the upper run ofthe traveling grate which constitutes the furnace-floor; the supply ofair to the several chambers ct, h, c, d, (when a series of these areused,) being regulated by the air-valves in the severaldistributingpipes described. Upon any change of speed of the motor M,the velocities of the blowingmachine and of the traveling-grate, thesetwo mechanisms being directly connected for proportional movements, arecorrespondingly changed, so as to supply to the furnace proportionateamounts of fuel and air for effecting the proper combustion of the fuelwhether the rate of combustion of the same be greater or less, withinordinary requirements. i

Having thus described my invention, I claim- IOO 1. In a furnace-plantof the class specified,

the combination with a traveling-grate furnace having an air-blastapparatus and having driving apparatus for actuating the grate, of ablowing-machine connected with the airsupply apparatus, amechanism-actuator connected with and actuating both the blowingmachineand the said driving-apparatus,and means for regulating and varying thespeed of the mechanism-actuator, whereby proportionate working movementsare imparted to the blowing-machine and the traveling grate,substantially as described.

2. In a furn ace-plant, the combination with a traveling grate furnacehaving an air-supply apparatus consisting of successive airblastchambers, of driving apparatus for actuating the traveling grate of thefurnace, a blowing-machine connected with and supplying the several.air-blast chambers, means for independently regulating the air-pressurein said chambers, respectively, and a mechanism-actuator connected withand actuating both the plowing-machine and the grate-drivingapparatus,substantially as described and for the purpose specified.

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grate-driving apparatus, and means for regulating the admission of steamto the engine for varying the speed of the same, substantially asdescribed and for the purpose specified.

ECKLEY B. COXE.

Witnesses:

STEWART F. MAGFARLANE, ELLIOTT A. OBERRENDER.

